The CPU usage Issue of Visual Studio 2010 on Windows 7 64bit

When I use Visual Studio 2010 editing a XMAL file, the cup usage climbs very high. My notebook equips  a dual core Intel T9400 processor. The Visual Studio 2010 will take about 50% of all cups. Look this picture.

In the Resource Monitor, we can see the orange line, presents the cup usage of the devenv.exe. When I opened the project, it ate about 50%. And soon it went down, but when the XAML code displayed, it climbed high again.

And the second picture:

I ran the very simple application and closed it. When Windows system’s focus back to Visual Studio 2010, the cup usage was about 50% for a while. When I captured this picture, it just started went down, we can see this in CPU list. The devenv.exe is 11%.

I tried the same code in my coworker’s Thinkpad W510, quad-core 8 threads. The highest usage is 15%. We should keep it mind that 50% in my 2 threads machine actually equals to 100% cpu usage on a single thread. And when 8 threads machine, 15% equals 100% on a single thread. The different is when Visual Studio 2010 eating my cpu, it is difficult to scroll down or up on the xaml editor. But 8 threads machine can scroll smooth.

I googled for a while. Somebody was reporting this issue on Microsoft bug report. But it seemed there was no official solution. Even I and my coworker have installed Visual Studio 2010 SP1, this issue still exist.

Why I say on “64bit” ? Because I usually develop my application in a VM which is Windows 7 32bit. And installed the same Visual Studio 2010 copy. The application had a more complex xaml structure than what’s on the picture above. But it dose not eat cup too much. So I wonder, this issue is Visual Studio 2010 did not perform well on Windows 7 “64bit” only.

If anyone have any solutions, or any thoughts about this issue. Tell me, please.